baber/WOPTO huggingface dataset:
Patent GB-176776-A (GB)
Title: Air purifier for breathing apparatus
IPC: A62B19/00
Filed: 1922-02-28
Abstract: 176,776. Inhabad-Ges. March 11, 1921, [Convention date]. Respiratory appliances.-An air-purifying cartridge a for a regenerative breathi n g apparatus is built up of guideplates b of corrugated or zig-zag section, the upper surfaces d of the plates being filled with a purifying-material, such as caustic soda, kept in place by a sheet of wire gauze c. Communication between successive layers is established by cutting segments from each plate to expose all the grooves, the cut edge having a ridge b<1> to retain the material used. The plates are threaded on a strip f to ensure that the air passages shall lie in the same direction, and are arranged with the cut segments alternately opposite. The Specification, as open to inspection under Sect. 91 (3) (a), describes another form, as in Fig. 6 (Cancelled), in which the plates b are used alternately with layers of purifying material held between gauze sheets h, c so arranged that the segmental passages of all the plates are on one side while the layers of material present passages on the other side. This subject-matter does not appear in the Specification as accepted.
Patent GB-655881-A (GB)
Title: Improvements in transmission line
IPC: H01P1/18
Filed: 1948-02-27
Abstract: 655,881. Wave-guides. DEPARTMENT OF COMMERCE, DIRECTOR OF THE OFFICE OF TECHNICAL SERVICES OF. Feb. 27, 1948, No. 5962. Convention date, Sept. 14, 1945. [Class 40 (viii)] A wave-guide 5 includes a block 6 of dielectric material which is transversely adjusted in the guide to alter its electrical length. The block may be mounted on two rods 9 and 9<SP>1</SP> which slide through holes in the wall of the guide and are disposed one-quarter of the operating wavelength apart to minimize the resultant reflections. The ends 8 and 8<SP>1</SP> of the dielectric block are also tapered for the same purpose. The dielectric plate is parallel to the electric vector of the mode propagated by the guide and, when moved across the guide, passes from a position of maximum intensity near the middle of the guide to lower intensities at the edges.
Patent GB-227014-A (GB)
Title: Improvements in or relating to means for heating air by hot gases
IPC: F23L15/02
Filed: 1924-03-08
Abstract: 227,014. Prat, E. March 8, 1924. Valves, neversing and like for air heaters composed of spaced metal sheets arranged in two groups through which the air to be heated and heating gases are passed alternately are, as shown in Figs 1 and 2, each composed of two pivoted vanes i, j and g, h. During reversal of the course of the air and gases through the heaters a, b, one vane of each valve is first displlaced so as to arrest the course of the gases as shown in Fig. 2, and then the second vane of each valve is reversed. By this arrangement of the valves, the mixing of air with the heating gases is prevented during reversal.
Patent GB-969366-A (GB)
Title: Adjusting device for the impeller blades of propeller pumps and other fluid flow rotary machines
IPC: F04D15/00
Filed: 1962-02-16
Abstract: 969,366. Axial-flow pumps. MASCHINENBAU A.G. BALCKE. Feb. 16, 1962 [Dec. 2, 1961], No. 6038/62. Heading F1C. In a device for adjusting the impeller blades of a fluid-flow rotary machine of axial-flow or semi-axial-flow type, an adjusting sleeve is arranged around the solid shaft of the machine, and planet gearing is arranged centrally on the shaft below an axial bearing for the shaft so that rotary movement introduced for adjustment purposes into the device is converted into an axial displacement or a rotary movement relative to the shaft, the planet gearing including one or more planet wheels carried on a planet carrier, and there is arranged in a stationary housing an intermediate gear which acts on a toothed rim of the planet carrier and imparts thereto the same speed ratio which corresponds to the compulsory rotation during the travel of each planet wheel on the toothed rims of an adjusting wheel and an adjusting housing. Fig. 1 shows part of the upper end of a pump shaft 1, surrounded by an adjusting sleeve 2 which at its lower end (not shown) is connected by linkage within the impeller hub to the variable-pitch impeller blades whereby adjustment of the pitch is effected by axial movement of the sleeve. Planet gears 7 mounted on a planet carrier 6 mesh with gear teeth formed on the inner periphery of a ring 10 and also mesh with a sun gear integral with a sleeve 4 having a screw-threaded engagement with the sleeve 2. The planet carrier 6 is driven from the pump shaft 1 through gearing 11, 12, the gear ratio being such that when the ring 10 is stationary the sleeve 4 is driven at a speed equal to that of the pump shaft 1 and sleeve 2. Adjustment is effected by turning the ring 10 through worm gearing 9 by means of a servomotor, thereby increasing or decreasing the speed of sleeve 4, the resultant rotation relative to the sleeve 2 producing, through the screwthreaded engagement between the sleeves, an axial movement of the sleeve 2 to effect the adjustment of the blade pitch. In a modification, the axially movable sleeve 2 is replaced by a rotatable sleeve directly connected at its upper end to the sleeve 4 and at its lower end to a further sleeve having a screw-threaded engagement within the impeller hub with an axially movable member connected by linkage to the variable-pitch impeller blades.
Patent GB-911239-A (GB)
Title: Improvements in wall construction slabs
IPC: E04B2/06
Filed: 1959-02-23
Abstract: 911,239. Building slabs; slab walls. BEESTON, A. W. (Mack's Gips & Gipsdielenfabriken). Feb. 22, 1960 [Feb. 23, 1959], No. 6089/59. Classes 20 (4) and 87 (1). Slabs of plaster of Paris to which a hardening agent and bitumen emulsion may have been added are joined by a preformed layer of pressure sensitive adhesive 5. The adhesive layer may be applied to opposite tongued and grooved edges of each slab or support strips 7 conforming to such edges and covered on each side with adhesive 5 may be interposed between slabs. In either case the adhesive surface may be protected in transit with a manually removable layer 6. Specification 699,878 is referred to.
Patent GB-597581-A (GB)
Title: Improved facsimile telegraph system
IPC: H04N1/06
Filed: 1945-03-12
Abstract: 597,581. Copying-telegraphy. TANDLER, W. S., and WALKER, D. S. March 12, 1945, No. 6107. [Class 40 (iii)] In a facsimile telegraph system incorporating at the transmitter a photo-electric scanning unit and at the receiver a synchronouslyoperated scriber, continuous message-carrying strips are employed, passing over the outsides of rotary cylinders containing the scanner and soriber units respectively. The transmitting cylinder and the scriber unit are longitudinally displaceable relatively to the scanner unit and receiving cylinder respectively so that helical inside scanning and reproduction is effected. The transmitters and receiver are driven from synchronous motors. In the transmitter, Fig. 1, paper from a roll 46 is supported on the pad 54 on which the message is written. On operating a control switch (not shown), the ratchet 56 is drawn round, and, by gearing, the message is drawn round the transparent cylinder 6. The scanning system comprises a lamp 29 in a stationary housing, light from which is reflected by a mirror through a lens to form a spot of light on the message, the diffuse light from which is received by the photo-electric cell 34. The mirror, lens, and the cell 34, are mounted in a rotatable cylindrical housing, which is co-axial with the transparent cylinder and with the stationary housing, and which commences to rotate upon operation of the switch: The cylinder 6, which is coupled to the scanning system moves transversely, i.e. perpendicular to the plane of the Figure, so that helical scanning is effected. After a predetermined transverse travel of the cylinder 6, the control switch is again operated to cause the motion to stop. Simultaneously the cylinder is released from its coupling to the scanning system so that, under the action of a spring, it is restored to its original position. The starting operation of the control switch also initiates the operation of the receiver, Fig. 4. Ratchet 138 is drawn round and a fresh piece of sensitive paper (which may be of the nitrate coated type) is drawn from the roll 141 on to the cylinder 105. A transverse slot in the cylinder allows the scriber 140 to touch the paper. The cylinder rotates carrying the scriber around with it, while the scriber is also attached to a lead screw whereby it is caused to move down the transverse slot so as to effect helical reproduction. After a predetermined travel of the scriber the receiver is switched off, by the second operation of the control switch, the lead screw disengaged and the scriber caused to return to its original position by means of a spring.
Patent GB-463510-A (GB)
Title: Improvements in or relating to trailer vehicles
IPC: B62D53/06
Filed: 1936-02-29
Abstract: 463,510. Vehicle wheel arrangements. HUDSON, J. DONALDSON-. Feb. 29, 1936, No. 6134. [Class 108 (ii)] In a tractor-trailer combination the front end of the trailer is provided with a road wheel permanently in contact with the ground and pivoted to afford a castor action and means may be provided for raising and lowering the front end of the trailer. The trailer 11 is connected to the tractor 10 by means of a towing arm 12 pivoted to the trailer frame at 13. The road wheel comprising twin wheels 14 is mounted in a frame 15 pivotal by means of its axis 16 in a cross-frame 17 which is connected to the side frames 18 of the trailer by springs 19. The front ends of the springs 19 are pivoted at 20 to the towing arm 12 and at the rear are connected to a pivoted shackle 21 having a number of holes 22 for adjustment purposes. An hydraulic cylinder 25 and ram 28 arrangement is connected to the towing arm 12 and the trailer frame 11 for raising and lowering the latter. To lower the trailer the rear ends of the springs 19 are disconnected from the shackle 21 and the hydraulic device allowed to telescope until the side frames 18 rest on the ground when the rear ends of the springs may be connected to the lower ends of the hydraulic device which is disconnected from the trailer frame and by disconnecting the towing arm from the trailer frame, the towing arm, castor wheel and hydraulic devices can be removed from the trailer frame. The castor wheel may be locked or prevented from swivelling by means of a pivoted bar engaging slots in the head of the pivot 16 or in a castellated nut on the pivot. In a modification, the shank of the castor wheel may form the ram of the hydraulic elevating device in which case an adjustable strut is arranged between the arm 12 and the trailer frame 11.
Patent GB-918234-A (GB)
Title: Improvements in protected photoconductive element and method of making same
Inventor: OWENS LLOYD
IPC: G03G5/043
Filed: 1959-02-23
Abstract: 918,234. Electrophotographic plates. RANKXEROX Ltd. Feb. 23, 1959, No. 6136/59. Class 37. An electrophotographic plate comprises a support carrying a layer of photoconductive insulating material and a transparent protective layer less than 0.1 mils. thick of an insulating or photoconductive insulating material with resistance to wear and tear superior to that of the underlying layer. In a preferred embodiment a layer of amorphous selenium or a mixture of arsenic and selenium between 0.05 and 1 mils thick is deposited on a conductive base. A protective layer 0.01 to 0.1 mils thick of zinc sulphide, silica, titania, silicates, or alkaline earth fluorides is coated on the layer by spraying brushing, painting, or in the case of zinc sulphide, by evaporation in vacuo. The sensitivity of zinc sulphide coated selenium or seleniumbased elements of this type is enhanced by heat treatment. For instance a zinc sulphide protected arsenic selenium element may be improved by heat treatment for 1-2 hours at 80-200 C. in an oxidizing atmosphere. Specifications 672,767 and 778,459 are referred to.
Patent GB-253466-A (GB)
Title: Improvements in and relating to pressure reducing valves or regulators
IPC: G05D16/10
Filed: 1926-03-05
Abstract: 253,466. Auld & Sons, Ltd., D., and Graham, J. March 5, 1926. Pressure - regulating valves. - A pressure regulator of the kind controlled by an auxiliary valve has the main valve so arranged that it is closed against the action of a spring by low pressure when the auxiliary valve closes an exhaust outlet. The main double beat valve b is connected by a spindle c to an actuating diaphragm d<3> backed by a packed piston d and is loaded to open by a spring g acting through a bolt g<1> and lever f<2>. The spindle c is also connected by a lever f<3> to a dashpot suspended by a rod f<3> from a lug f<4>. The auxiliary valve h<1> balanced by a piston h<2> is connected by a spindle j to an actuating diaphragm. l<1> backed by a piston k and adjustably loaded by a spring n acting through a bolt n<1> and lever n<2>. This lever is fitted with an adjustable stop t and the adjustable abutment for the spring is provided with an indicator v working in conjunction with a scale v<1>. The auxiliary valve has an actuating chamber i<2> to which low pressure is admitted through a pipe q, a chamber i<1> connected to the actuating chamber f<1> of the main valve through a pipe p<1> and to the low pressure side of the main valve through a pipe p throttled by a valve p<2> and a chamber i connected by a pipe r to drain or atmosphere.
Patent GB-1255599-A (GB)
Title: Process for the preparation of oxalic acid
IPC: C07C55/06
Filed: 1970-02-09
Abstract: 1,255,599. Oxalic acid. RHONE POULENC S.A. 9 Feb., 1970 [10 Feb., 1969], No. 6179/70. Addition to 1,154,061. Heading C2C. In a process for the preparation of oxalic acid by the introduction of propylene into nitric acid at 10-40‹ C. and heating to 45- 100‹ C., the nitrous fumes formed are simultaneously removed so that the concentration, expressed as N0 2  is maintained between 1 and 10% by weight. The concentration of nitric acid in the solution is maintained at 50-70% by weight and the molar ratio of propylene to 100% nitric acid being maintained between 0À1: 1 and 0À5 : 1.
Patent GB-1524311-A (GB)
Title: Catapult trigger machanism
IPC: F41J9/24
Filed: 1977-05-17
Abstract: 1524311 Triggers for target catapults LESLIE HEWETT Ltd 17 May 1977 [17 Feb 1976] 06230/76 Heading A6D A trigger mechanism for a target catapult e.g. for clay pigeon shooting, is operated by release of an electro-magnetic trigger 6 controlled by a firing switch 12 which is connected in series with a safety switch 13, the closure of which indicated at an inducter 17 primes the mechanism for triggering by closure of the firing switch 12 which action automatically re-opens the safety switch 13. As shown, after closure of a safety switch 13 indicated by a lamp 17, closure of the firing switch 12 energises a priming relay 11 to close a switch 10 and thereby energise a trigger release solenoid 7; a movable armature of which withdraws trigger 9 releasing a cocked firing arm 1 to project a target 3. Withdrawal of the trigger acts through levers 8, 15 to re-open the safety switch 13 and de-energise the primary relay. The firing switch may be operable by a hand/foot operated switch or may be a transister switch operable by a voice signal input from a microphone.
Patent GB-780699-A (GB)
Title: Improvements in and relating to pumps for the conveying of gases
IPC: F04B7/00
Filed: 1956-02-29
Abstract: 780,699. Gas pumps. VOGT, A. Feb.29, 1956 [March 5, 1955], No. 6291/56. Class 8(1). In a mechanically operated gas pump having a chamber with means for periodically raising and lowering the level of a liquid contained therein, permanent communication is provided between said chamber and the discharge side of the pump so that during the suction stroke of the pump a vacuum is created in the chamber by the lowering of the liquid level, gas is introduced through an inlet valve and liquid flows slowly from the discharge side into the chamber but does not fill same, and during the discharge stroke the raising of the liquid level expels the gas and part of the liquid from said chamber. The means for raising and lowering the liquid level may comprise a piston or, as in Fig. 1b, a diaphragm 5 clamped between plates 9 connected to a shock absorbing fitting 8 reciprocated by a motor. The pump casing 1 encloses a lining 4 of synthetic material shaped to form the main pump chamber, a space 22, and discharge pipe 24, with a bore 23 and aperture 21 between them. A pipe 12 from the gas supply is normally closed by an inlet valve 15 being held on its seat 18 by a tension spring 16, the valve being opened when a dog 19 carried by upper plate 9 engages a dog plate 20 on the valve. Initially mercury in exhaust pipe 24 fills space 22 and the pump chamber beneath. On the downward stroke of the diaphragm 5 a vacuum is created in the pump chamber. The small aperture 21 allows mercury to flow from space 22 into the chamber but not fast enough to fill the vacuum. The latter is filled with gas from inlet 12 when dog 19 opens the valve 15. Since bore 23 is smaller than aperture 21, a vacuum is created in space 22 as mercury cannot enter through bore 23 so quickly as it flows out of aperture 21. On the upstroke of the diaphragm the valve 15 is closed, gas is compressed in the chamber and is expelled therefrom together with some of the mercury. The gas in space 22 is compressed and is then expelled with some of the mercury into the discharge pipe 24. Hence the action of a two-stage pump is attained. In the embodiment of Fig. 2, the effect of the aperture 21 is obtained by a spring-loaded valve 52 and a passageway 67 which may be in the valve or the surrounding member ; the space 22 is replaced by a space enclosed by an elastic hose member 57 ; and the bore 23 is replaced by a bore 68 in a valve body 59.
Patent GB-164121-A (GB)
Title: An improved method of erecting walls or buildings and to means for use therefor
IPC: E04B2/30
Filed: 1920-03-02
Abstract: 164,121. Stark, J. D. W. March 2, 1920. Double walls With concrete fillings; bricklaying apparatus.-For use in erecting walls, outer and inner temporary framework is used comprising vertical uprights A secured to the foundation by quasi-dowels or concrete supports and held together at their upper ends by cross-bars, and guides or gauges D against which the blocks are laid and which are supported by the uprights. The blocks E, E<1> are made with interfitting outer edges and with undercut grooves round all the inner edges, and the faces are separated by distance-pieces F; the space between the blocks is afterwards filled in with grouting which binds tho whole together, reinforcement H, H' with splayed ends being used if required. Hollow foundation blocks G mav be used and a similar coping stone employed on flat-topped grouting as shown in Fig. 7. The supports A for the guides D may be used to support brackets for the scaffolding.
Patent GB-565846-A (GB)
Title: Improvements relating to the opening of clumps of staple fibre
IPC: D01G1/04
Filed: 1943-04-20
Abstract: 565,846. Opening clumps of staple fibre. AMERICAN VISCOSE CORPORATION. April 20, 1843, No. 6301. Convention date, July 18, 1942. [Classes 120 (i) and 120 (iii)] Clumps or bundles of staple fibre are opened by throwing the clump in free flight against a plane surface comprised of indentations, i.e. grooves, corrugations, serrations or notches, the pitch of the indentations facing the clumps in its flight being less than the effective dimension of the clump parallel thereto. Fibre clumps 4, Fig. 1, from a cutter of the type described in Specification 289,028, [Class 120 (iii)], are thrown against the serrated surface 3 so that they are impacted thereupon and splatter across the surface. If the tow of continuous filamentary material is in a plastic condition at the time of cutting, the surface 3 acts to crimp the fibres simultaneously with the opening of the clumps and a fluid jet may be sprayed over. the surface 3 from a supply 9 to assist removal of the fibres. In a modification, the operating surface 11 is notched on its underside at 12, Fig. 4, and the surfaces of the notches are arranged substantially parallel to the plane of rotation of the radial channel 7 of the disc 5 of the cutter. The dimensions and angular disposition of the indentations may be varied. Specifications 387,145, 448,671 and 554,613 are also referred to.
Patent GB-711651-A (GB)
Title: Preparation of decahydrodipyrrolo-(a,d)-pyrazine
IPC: C07D487/14
Filed: 1952-03-11
Abstract: The invention comprises decahydro-dipyrrolo-(a,d)-pyrazine, obtainable by hydrogenation with ring-closure of the compounds: <FORM:0711651/IV (b)/1> in which Y is C=O or CH2, and Z is CH2OH or an ester group, or of compounds convertible into such compounds. Examples describe the hydrogenation of butyl pyroglutamate, and 5-hydroxymethyl-2-pyrrolidone, with copper chromite catalyst at hydrogen pressures up to 2000 p.s.i.  Dibutyl glutamate and other glutamic esters and proline esters may be used.  With esters, a two-stage process is preferred to prevent side-reactions.
Patent GB-845465-A (GB)
Title: Improvements in or relating to rotary pumps
Inventor: VANDERSTEGAN-D STAMFORD ROBERT
IPC: F04C2/348
Filed: 1958-02-28
Abstract: 845,465. Rotary pumps. PLENTY & SON Ltd. March 2, 1959 [Feb. 28,1958], No. 6552/58. Class 110 (2). The pump having a rotor 16, rotating in a stationary sleeve 18, has one or more ducts 22 provided between the members 16, 18 on the suction side A, and pressure fluid from the delivery B is led through the ducts to counterbalance the thrust on the rotor 16 from the delivery. Specification 689,313 is referred to.
Patent GB-728283-A (GB)
Title: Electrical pulse circuits
Inventor: WRIGHT MICHAEL ARTHUR
IPC: H03K5/00
Filed: 1951-03-19
Abstract: 728,283. Pulse circuits. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Feb. 21, 1952 [March 19, 1951], No. 6578/51. Class 40 (6). In a circuit for generating a single pulse timed precisely with an arbitrary pulse in an applied train, one of a first pair of triodes A acts as the common cathode load to a second pair B, the input train 5 being fed directly to pair B and through a differentiating and clipping circuit 6, 7 to pair A. Left valve A is normally conducting since the right grid is biased more negatively over resistors 11, 31 and switch contact S, the negative-going differentiated pulses being ineffective. As right valve A is cut off no cathode current flows in valve B. When switch S is operated, it passes momentarily between the two contacts and the grid potential rises rapidly towards earth until diode 15 conducts to hold the grid just below the potential of the grid of left valve A. One of the negativegoing differentiated input pulses causes the anode of left valve A and hence the grid of right valve A to rise sufficiently in potential for the two valves to reverse their state and remain in this condition due to the comparatively long time constant 10, 11, 14 until the switch S makes contact again. The flow of current through right valve A passes through right valve B since the grid of left valve B is driven negative by the incoming pulse and hence develops the leading edge of the output pulse. The trailing edge of the input pulse causes the valves B to reverse their state and thus terminate the output pulse. Due to the long time constant 16, 17 valves B remain in this state until valve A is restored cutting off the cathode current to both valves B. Specification 717,114, [Group XIX], is referred to.